[Q] Question about returning phone

Hey guys I need to return my phone to be fixed, but have a slight problem. The firmware is all stock except for when it boots up it says it is a GT-I9100. This is left from a previous flash that I did, but I went back to stock and never bothered to fix that, because it didn't really bug me. Now my phone won't recognize a charger or any usb plugs. My question is will Samsung/AT&T still accept my phone for replacement with this? If not is there anyway I can fix the boot screen without plugging my phone in? Thanks guys sorry for the noob question, but I am not really sure what to do and this is kind of a specific problem, so I couldn't find anything in the search. Once again really appreciate any help!

As long as you root it, you can use Mobile Odin. Not like it matters anyway, you just need to get rid of the GT-I9100 and then flash back to stock again, thus eliminating root.

Did Odin one-click back to stock not work for you? Because it sounds like you might have flashed I9100 bootloaders and flashing I777 bootloaders should fix it (which if I'm not mkstaken, the one click does include). Someone correct me on both points if I'm wrong , I'm simply conjecturing.

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